G8JCFSDR Manual Install

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If you are having problems with installing or running G8JCFSDR you can try manually installing the software by following the steps below - email G8JCF  with any comments - also take a look at the Problems ? section on the Shaft Encoder page.

If you are using a 64 bit version of Windows, then references to SYSTEM32 should be changed to SYSWOW64

1)    Create a directory, eg C:\G8JCF

2)    Download [use Save Target As option; right click]  G8JCFSDR.EXE  into the directory just created, this is the main programme

3)    Download [use Save Target As option; right click] HamBandPlan.bpl, BroadcastBands.bpl, BBCBandPlan.bpl, VolMetBandPlan.bpl into that directory - Band Plans for presets - you must have at least one bandplan installed

4)    Download G8JCF.DLL into C:\WINDOWS\SYSTEM32 - DSP & Vector Library

5)    Download G8JCFDIAL.OCX into C:\WINDOWS\SYSTEM32 - Dial Control
        Register the dial  control by starting up a command box from Start | Run and executing
        regsvr32 c:\windows\system32\g8jcfdial.ocx     

6)    Download INPOUT.DLL into C:\WINDOWS\SYSTEM32  - Parallel Port bit twiddling I/F

7)    Check that you have DirectX 8.1 or greater installed; Run c:\windows\system32\dxdiag.exe

8)    Check that you have the MS VB6 Runtime installed; Search/Find Files c:\windows\system32\msvbvm60.dll

9)    Check that you have MS C Runtime installed; Search/Find Files c:\windows\system32\msvcrt.dll

10)    Check that you have MS Comm control installed; Search/Find Files c:\windows\system32\mscomm32.ocx

11)    Run G8JCFSDR.EXE to execute the SDR s/w

12)    If you want to use the Intel SPL to reduce CPU consumption then Google for "Intel Signal Processing Library", eg http://www.bk.isy.liu.se/candide/wincandide/intel.zip and install the library into c:\windows\system32.

I have tested the SDR S/W on Windows 98, Windows ME, Windows XP/Pro. Windows 7, Windows 8, Windows 10 Because Windows NT does NOT support DirectX later than version 3, I'm afraid that NT owners are out of luck. 

The soundcard is very important from a quality point of view. The Sound Card must support Full-Duplex 48KHz sampling rate [anything bought in the last 5yrs should be fine].  Before you try and use the SDR S/W  make sure that you get your PC + Soundcard level settings for the Line or Mic inputs right to work with the DRT1 H/W. The DRT1 can output over 1 V so driving the Line input is best, but if you are using a portable, then you'll probably have only a Mic input. On very strong AM stations, the output level of the H/W can overdrive the input of your soundcard especially if you use the Mic input - Two options, unplug from the Mic and plug into the Line (not good for weak signal reception and inconvenient), or put a 4K7 ohm potentiometer between the board and the soundcard Mic input which you can adjust. Look at the EXT display at the left-hand-side of the bottom pane to see the level of the Input signal coming out of the ADC - values between 500 to 8191 are good.